Resolution; Scan Type; Black & White- Page 41

Scanning

34

2

Resolution

2

You can choose a scanning resolution from the 

Resolution

 drop-down list. Higher resolutions take more 

memory and transfer time, but produce a finer scanned image. The following table shows the resolutions you 
can choose and the available colors.

Scan Type

2

„

Black & White

Use for text or line art.

„

Gray (Error Diffusion)

Use for photographic images or graphics. (Error Diffusion is a method for creating simulated gray images 
without using true gray dots. Black dots are put in a specific pattern to give the appearance of gray.)

„

True Gray

Use for photographic images or graphics. This mode is more exact because it uses up to 256 shades of 
gray.

„

256 Color

Uses up to 256 colors to scan the image.

„

24 bit Color

Uses up to 16.8 million colors to scan the image.
Although using 

24 bit Color

 creates an image with the most accurate color, the image file will be about 

three times larger than a file created with 

256 Color

. It requires the most memory and has the longest 

transfer time.

Resolution

Black & White/
Gray (Error Diffusion)

256 color

True Gray/24 bit color

100 

×

 100 dpi

Yes

Yes

Yes

150 

×

 150 dpi

Yes

Yes

Yes

200 

×

 200 dpi

Yes

Yes

Yes

300 

×

 300 dpi

Yes

Yes

Yes

400 

×

 400 dpi

Yes

Yes

Yes

600 

×

 600 dpi

Yes

Yes

Yes

1200 

×

 1200 dpi

Yes

No

Yes

2400 

×

 2400 dpi

Yes

No

Yes

4800 

×

 4800 dpi

Yes

No

Yes

9600 

×

 9600 dpi

Yes

No

Yes

19200 

×

 19200 dpi

Yes

No

Yes